Tunnel typed coking furnace with a movable sliding bed and the method using the same

ABSTRACT

The invention refers to a tunnel typed coking furnace with a movable sliding bed and the method using the same belonging to the coking field, comprising a furnace body ( 48 ), a front sealing door ( 7 ), a back sealing door ( 25 ), a branch flue ( 10 ), a bottom flue ( 12 ) and a main flue ( 6 ), comprising a first preparation chamber ( 3 ) for coaling, a preheating segment ( 50 ), a carbonization segment ( 51 ), a coke dry quenching segment ( 52 ), and a second preparation chamber ( 23 ) for coke outlet; each part has different formation from the others, and are interconnected in series with the others; the sliding bed ( 37 ) for coaling and tamping coal material ( 44 ) passes through the abovementioned five segment in series in order to coke. The invention may realize a production coal material with fixed formation through formation process with pressure, so as to obtain the coke product with the same and big size, in addition to high strength, high utilization rate of heat energy, high degree of mechanization, and it also may realize the clean exhaustion of flue, so as to be able to protect the environment and water resource, and realize clean production.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to an apparatus and a method for producing cokefrom coal and in particular to a tunnel typed coking furnace with amovable sliding bed and the method using the same, which can worksuccessively, and may produce the production type coke and tamping coke,which also not only can realize the recovery of the chemical productsbut also may realize power generation utilizing the excess heat.

2. Description of the Related Art

The coking technology is mainly available in the conventional chemicalrecycling, top mount or side mount tamping coke machine,

Its defect refers to high dependence on the type of coal selected, andhigh cost of raw materials, the sizes of cokes vary and can be verysmall, and the coal gas may runaway in the process of operation. Thecoking technology is also used in the heat recovery coking furnace inwhich the chemical product is not recovered, but the coking time forthis type of furnace is very long, and it is unable to accuratelycontrol product temperature and rate even in the same carbonizationchamber, the quality of different cokes may vary. In addition, the twoabove mentioned coking furnace needs large equipments for coal charging,tamping, coke pushing, coke receiving, and the cost of equipments may bevery high. and also the resistance for removing is very high and thisresults in the fact that the coal material may crack when tamping thesame, so as to decrease the density and the sturdiness of coal material,and also break the coke when pushing out the coke with a huge force,finally, the mechanical means may abrase the bottom of furnace.

The Chinese Patent No. 20060012705.0, discloses a tunnel type cokingfurnace, for which the furnace is enclosed all around. Although thefurnace is divided into several segments such as drying segment, drydistillation segment and air-cooling segment, but in fact, it is just avery simple division in terms of the temperature and the state of coalmaterial, the change of temperature of drying segment only depends onthe heat exchange between the drying segment and the dry distillationsegment due to the temperature difference therebetween, and the yieldmay be affected by the low production rate; the air-cooling segment iscooled down after the red coke coal gas is burnt out, and the furnacebody is not accurately divided. In addition, no complete sealing isformed between two tunnel kilns, or between the kiln bottom and thesurroundings, and it also can not recover coal gas and chemicalproducts, and also have the shortage of unreasonable heat utilization,low coking rate and low yield.

SUMMARY OF THE INVENTION

In view of the above-described problem, this invention is to provide acoking furnace with reasonable structure, broad scope of selection ofraw materials, high product quality, high yield, high utilization ofheat, which is easy to repair and maintain and can recover coal gas andchemical products, and also may realize power generation with excessheat, and can be environmentally protective; and this invention alsoprovides a method of using the same.

To achieve the above objectives, in accordance with one embodiment ofthe invention, provided a tunnel typed coking furnace comprising a firstpreparation chamber for coaling, a preheating segment, a carbonizationsegment, a coke dry quenching segment, and a second preparation chamberfor coke outlet.

In a class of this embodiment, the first preparation chamber, comprisesof two first sealing walls, a first sealing door, a front sealing doorof the furnace body, a first ceiling board and a first floor board; anda first displacement air supplying channel is formed under the floorboard and connected to the bottom flue of the preheating segment, andthe first displacement supplying channel is provided with a firstcontrol valve for controlling the supply of the displacement air; and asecond displacement air exhausting channel is formed on the firstceiling board and connected to the main flue, and the first displacementair exhausting channel is provided with a second control valve; afterthe sliding bed enters the first preparation chamber. The air in thefirst preparation chamber is displaced with the oxygen free gasexhausted from the bottom flue after combustion (or with the Nitrogenfrom a Nitrogen generating machine); and after displacement, the frontsealing door of furnace body are opened as the internal room of thefirst preparation chamber is kept as an internal circulation in sealingstate; and then a sliding bed is pushed to the preheating segment, so asto ensure no smoke and dust coming out during the process of coaling andprovide an atmosphere required for the recovery of gas chemical productof coal gas in the preheating segment. The first preparation chamber isseparated from the preheating segment through the front sealing door ofthe furnace body.

In a class of this embodiment, no flame guiding port is provided on thetwo side walls of the preheating segment and the coke dry quenchingsegment respectively. the preheating segment are connected with eachother through a bottom flue, and are also connected the bottom channelsthereof; the bottom channel of the preheating segment is provided with atemperature regulating port connected to a exhausted hot air ascendingchannel formed inside the two side walls of the preheating segment, andis also provided with a second regulating damper for regulating the airpassage in the exhausted hot air ascending channel; and the exhaustedhot air ascending channel is connected with the main flue through thebranch flue; and the main flue is connected with a chimney outside; abranch coke gas collecting tube is formed at the top of the preheatingsegment and is connected with a gas collecting mains; and also the gascollecting mains is connected with a gas purification system forchemical product recovery.

In a class of this embodiment, the preheating chamber is provided with ahot air channel extending from the inside of the furnace to the insideof internal and external walls of the carbonization segment; and theoutlet of the hot air channel is provided with a regulating valveconnected with an oxygen inlet formed in the gas descending channellocated at the top of the carbonization segment and the oxygen tubeformed in the bottom channel of the carbonization segment respectivelythrough tubes; a plurality of gas descending channels, each of which isprovided with a third regulating damper, are formed inside the two sidewalls of the carbonization segment; and a flame guiding port connectedto the upper side of the carbonization segment, is formed on the upperside of the internal wall of gas descending channels; an openable flameobservation port is corresponding to the flame guiding port is formed onthe external wall of furnace; the lower side of the gas descendingchannels is connected to the corresponding bottom channel of thecarbonization segment which is also provided with a first air inletconnected with gas descending channels (40) for supplying the air to thebottom channel of the carbonization segment; and the upper side of theinternal wall of the carbonization segment is provided with a second airinlet staggered with the gas descending channels and disconnected withthe same, which is used for the emergency of power failure.

In a class of this embodiment, a plurality of gas blocking dampers whichare also able to block flame, containing Zirconium fibers, are providedin the space at the furnace top for partitioning the top space of thepreheating segment, carbonization segment and the coke dry quenchingsegment.

A preheating chamber formed between the internal and the external wallsof the two side walls has a heat exchange channel connecting the heatexchange box arranged at the top of the coke dry quenching segment tothe bottom channel formed at the bottom of the coke dry quenchingsegment, and the heat exchange box provided with a first regulatingdamper and a first cold air tube is formed at the top of the coke dryquenching segment; and the bottom channel provided with a secondregulating damper and a second cold air tube connected with centrifugalfan is formed at the bottom of the coke dry quenching segment. A backsealing door is arranged at the back end of the coke dry quenchingsegment.

In a class of this embodiment, a second preparation chamber for cokeoutlet outside the coke dry quenching segment is formed by two secondsealing walls, a second sealing door, a back sealing door of the furnacebody, a second ceiling board and a second floor board; a seconddisplacement air supplying channel connected with the bottom flue of thepreheating segment is formed under the floor board of the secondpreparation chamber for coke outlet, and is provided with a thirdcontrol valve for controlling the supply of the displacement air; and asecond displacement air exhausting channel connected with the main flueis formed on the second ceiling board of the second preparation chamberfor coke outlet, and is provided with a fourth control valve; and thesecond sealing door of the second preparation chamber for coke outlet isconnected with the circulation slide way formed outside.

In a class of this embodiment, the coke dry quenching segment is locatedbehind the carbonization segment, or is formed outside the secondpreparation chamber for coke outlet, further comprising a coke dryquenching chamber exclusively used by the sliding bed, and a gas inletchannel and a gas outlet channel are formed respectively at the bottomand top of the coke dry quenching chamber; and a coke quenching chamberwith low moisture is further formed beside each coke dry quenchingchamber as a standby. The displacement gas used in the first preparationchamber, coke outlet preparation chamber and coke dry quenching chamberis oxygen free flue gas after combustion exhausted from the bottom flueof preheating segment or Nitrogen from a Nitrogen generating machine.

In a class of this embodiment, the sliding bed for loading briquette ortamping coal material is formed by the heat-resistant metal plates orheat-resistant steel plates and non-metallic alumina refractory board orcordierite-mullite boards; and a slide way is formed above the bottomchannels and between the sliding bed and the bottom channels, the slideway is formed by high-density silicon bricks, high alumina bricks,aluminum phosphate bricks, phosphate bricks, corundum bricks,polycrystalline carbonized silicon or polycrystalline silicon nitride.

In a class of this embodiment, the sliding bed directly slides on theslide way; alternatively, a plurality of scrollable round refractoryballs, cylindrical refractory rollers, heat-resistant bearings, orheat-resistant steel bars are arranged on the slide-way for the slidingbed to slide on, in order to reduce the resistance to the sliding. theslide way is with horizontal placement or inclined placement while thefront segment of the slide way is positioned higher than the backsegment thereof.

The coal material is loaded on the sliding bed and sent into the furnacefor coking, after coal material is tamped or formed with pressure; thecoal material is kept stable on the sliding bed. And the use ofequipment to form the coal material with pressure may allow the tapdensity of coal material to reach 1.40 t/m3 or even higher, (reaching0.7˜0.75 t/m3 for top loading coal, and reaching 0.95˜1.15 t/m3 fortamped coal). It can reduce the gap between coal particles after the tapdensity of coal material is enhanced. It can reduce the number of liquidphase products of gelatinoids for filling the gaps among coal particlesin the process of coking, so that only a few liquid phase products ofgelatinoids are needed to combine separated coal particles together,meanwhile, it is also possible to avoid the gas phase products of beingseparated due to the reduced gaps among coal particles, so as to enlargethe inflation pressure of gelatinoids, compact the formed coalparticles, and further strengthen the combination of coal particles, inaddition, it facilitates the inter-condensation between free radical andunsaturated compound generated after pyrolysis, allows the generation ofappropriate molecules and liquid phase products that is chemicallystable and non-volatilized. Therefore, it makes possible for producinghigh strength and high quality coke by using low cost value coal withoutadhesion or with low adhesion, significantly broaden the scope ofresourcing coal material, enhance the selectability of different typesof coal materials, reduce the cost of raw material used, and improve theyield and recovery rate.

In a class of this embodiment, heat consumed in the carbonizationprocess is for dry distillation by separating oxygen, which is carriedout after combusting the coal gas with the hot air in the bottom channelof the carbonization segment, dehydrating and preheating the coalmaterial. The high temperature flue is introduced into the preheatingsegment through the bottom flue, and then dehydrate and preheat the coalmaterial, meanwhile, the heat in the coke dry quenching segment istransferred to the heat storage chamber through the centrifugal fanarranged at the end of the preheating chamber of the coke dry quenchingsegment, so as to combust the coal gas only with hot air. This may notonly significantly reduce the amount of coal gas consumed forcarbonizing the coal material, but also allow the flue to be transferredto heat recovery steam boiler through the branch flue, and the mainflue, thereby minimum the energy for coking in this coking system.

In a class of this embodiment, the arrangement and configuration of thefirst preparation chamber and the second preparation chamber and thedisplacement to the air in the first preparation chamber and the secondpreparation chamber before the coke outlet from the second preparationchamber with the oxygen free gas after combustion exhausted from thebottom flue or with the Nitrogen from a Nitrogen generating machine maynot only ensure no smoke and dust coming out in the process of coalingand coke outlet, but also provide an atmosphere required for chemicalproduct of coal gas in the preheating segment and quenching coke in thecoke dry quenching segment.

The invention may not only realize the coking and power generation in aclean and energy-saving way by utilizing the above mentioned equipmentand the process using the same, but also realize the recovery ofchemical product of coal gas, in addition, it also has the followingadvantages:

-   -   1. The use of sliding bed may avoid decrease the density and the        sturdiness of coal material, and also avoid the coke of being        broken when pushing out the coke with a huge force; it may also        realize a production coal material with fixed formation through        formation process with pressure, so as to obtain the coke        product with the same and big size, in addition to high        strength.    -   2. The use of sliding bed and the division of the furnace into        several segments may realize an accurate control of the heating        temperature and heating rate, and allow the curve of heating to        be in accordance with the that of the coking, and also reduce        the time of coking, improve the utilization rate of heat energy,        and the degree of mechanization during the whole process of        production.    -   3. It may carbonize and coke the coal material such as        anthracite coal with less than 13% fugitive constituent when        used as the main coal material put into the furnace, or the coal        material containing non coking coal, so as to produce high        quality foundry coke and metallurgical coke, broaden the scope        of resourcing, reduce the cost, achieve low coal consumption        rate, high product recovery rate, and high rate of finished        product.    -   4. The remaining chemical product such as coal gas, tar oil and        crude benzol during the process of coking can be completely        recovered. And the remaining clean coal gas can be used in the        internal combustion engine for power generation, and the        residual heat after coking may be used in steam turbine        generator for power generation, and may achieve low cost of        power generation, and high economic value added. The tons of        coke consumption is less than 150 kg/standard coal, the partial        heat generated is used for carbonization, and the rest heat can        be used for power generation, so as to save energy.    -   5. The use of hot air for combustion with coal gas and the        carbonization of coal material after being preheated may        significantly enhance the utilization rate of heat energy,        reduce the coking time consumed, and increase the yield.    -   6. When the coal material with less than 13% fugitive        constituent, such as anthracite coal, and coke powder, is used        in the production, there is no need for chemical product        recovery as such coal material barely contains the chemical        products such as tar oil, and benzene, so that it may avoid the        generation of carcinogens such as phenol and benzopyrene. The        dry quenching process is very simple, and realizes the        protection and sufficient utilization of the water resource. The        desulfurization and dedusting with flue may achieve clean flue        exhausted, so as to effectively protect the external        environment, and realize clean production.    -   7. The cost of equipments used is low, and the equipments are        also easy to maintain. The periods of construction and        investment recovery are very short.

BRIEF DESCRIPTION OF THE DRAWINGS

Detailed description will be given below in conjunction withaccompanying drawings:

FIG. 1 is a schematic view of the tunnel typed coking furnace with amovable sliding bed;

FIG. 2 is a schematic view of the preheating segment (A-A sectionalview);

FIG. 3 is a schematic view of the carbonization segment (B-B sectionalview);

FIG. 4 is a schematic view of the coke dry quenching segment (C-Csectional view);

In the drawings, the following reference numbers are used:

1—furnace body base, 2—second insulating layer, 3—first preparationchamber, 4—first sealing door, 5—second displacement air exhaustingchannel, 6—main flue, 7—front sealing door, 8—branch coke gas collectingtube, 9—Zirconium fibers damper, 10—branch flue, 11—exhausted hot airascending channel, 12—bottom flue, 13—second displacement air supplyingchannel, 14—oxygen tube, 15—first air inlet, 16—third regulating damper,17—oxygen inlet, 18—flame observation port, 19—hot air channel,20—regulating valve, 21—heat exchange box, 22—preheating chamber,23—second preparation chamber, 24—second sealing door, 25—back sealingdoor, 26—second displacement air exhausting channel, 27—second airinlet, 28—gas collecting mains, 29—second regulating damper,30—temperature regulating port, 31—-first regulating damper, 32—secondregulating damper, 33—furnace top, 34—first insulating layer, 35—slideway, 36—refractory ball, 37—sliding bed, 38—bottom channel, 39—ceilingbeam, 40—gas descending channel, 41—first cold air tube, 42—second coldair tube, 43—centrifugal fan, 44—tamping coal material, 45—flame guidingport, 46—bottom channel, 47—bottom channel, 48—furnace body, 49—heatexchange channel, 50—preheating segment, 51—carbonization segment,52—coke dry quenching segment, 53—first control valve, 54—second controlvalve, 55—third control valve, 56—fourth control valve.

DETAILED DESCRIPTION OF EMBODIMENTS

There are specific modes for carrying out the invention with thedrawings (FIG. 1 to FIG. 4)

A tunnel typed coking furnace, comprising a furnace top 33, a firstinsulating layer 34 formed at the furnace top 33, a ceiling beam 39, twoside walls, a furnace body 48 formed by a furnace body base 1 and afurnace bottom constituted by a second insulating layer 2 formed at thebottom of the furnace, a front sealing door 7 of the furnace body, aback sealing door 25 of the furnace body, a branch flue 10, a bottomflue 12, and a main flue 6, is characterized in that the tunnel typedcoking furnace consists of a first preparation chamber 3 for coaling, apreheating segment 50, a carbonization segment 51, a coke dry quenchingsegment 52, and a second preparation chamber 23 for coke outlet, andeach part has different formation from the others, and areinterconnected in series with the others; and a plurality of individualbottom channels 38,46,47 are formed above the first insulating layer 2,and perpendicular to the direction of the series connection of the partsof the furnace body; and a slide way 35 that the sliding bed 37 forloading briquette or tamping coal material 44 moves on is formed at thetop of the bottom channels; and a heat exchange box 21 is formed at thetop of the furnace wall of coke dry quenching segment 52; and apreheating chamber 22 formed between the internal and the external wallsof the two side walls has a heat exchange channel 49 connecting the heatexchange box 21 arranged at the top of the coke dry quenching segment tothe bottom channel 47 formed at the bottom of the coke dry quenchingsegment 52, and the heat exchange box 21 provided with a firstregulating damper 31 and a first cold air tube 41 is formed at the topof the coke dry quenching segment 52; and the bottom channel 47 providedwith a second regulating damper 32 and a second cold air tube 42connected with centrifugal fan 43 is formed at the bottom of the cokedry quenching segment 52; and the preheating chamber 22 is provided witha hot air channel 19 extending from the inside of the furnace to theinside of internal and external walls of the carbonization segment 51;and the outlet of the hot air channel 19 is provided with a regulatingvalve 20 connected with an oxygen inlet 17 formed in the gas descendingchannel located at the top of the carbonization segment and the oxygentube 14 formed in the bottom channel of the carbonization segmentrespectively through tubes; and a plurality of gas descending channels40, each of which is provided with a third regulating damper 16, areformed inside the two side walls of the carbonization segment; and aflame guiding port 45 connected to the upper side of the carbonizationsegment, is formed on the upper side of the internal wall of gasdescending channels 40; an openable flame observation port 18 iscorresponding to the flame guiding port 45 is formed on the externalwall of furnace; the lower side of the gas descending channels 40 isconnected to the corresponding bottom channel 38 of the carbonizationsegment which is also provided with a first air inlet 15 connected withgas descending channels 40 for supplying the air to the bottom channelof the carbonization segment; and the upper side of the internal wall ofthe carbonization segment is provided with a second air inlet 27staggered with the gas descending channels 40 and disconnected with thesame; and the central areas of the bottoms of the carbonization segment51 and the preheating segment 50 are connected with each other through abottom flue 12, and are also connected the bottom channels 38,46thereof; the bottom channel 46 of the preheating segment 50 is providedwith a temperature regulating port 30 connected to a exhausted hot airascending channel 11 formed inside the two side walls of the preheatingsegment 50, and is also provided with a second regulating damper 29 forregulating the air passage in the exhausted hot air ascending channel11; and the exhausted hot air ascending channel is connected with themain flue 6 through the branch flue 10; and the main flue 6 is connectedwith a chimney outside; and no flame guiding port is provided on the twoside walls of the preheating segment 50 and the coke dry quenchingsegment 52 respectively.

The sliding bed 37 for loading briquette or tamping coal material 44 isformed by the heat-resistant metal plates or heat-resistant steel platesand non-metallic alumina refractory board or cordierite-mullite boards;and a slide way 35 is formed above the bottom channels 38,46,47 andbetween the sliding bed 37 and the bottom channels 38,46,47, the slideway 35 is formed by high-density silicon bricks, high alumina bricks,aluminum phosphate bricks, phosphate bricks, corundum bricks,polycrystalline carbonized silicon or polycrystalline silicon nitride

The sliding bed 37 directly slides on the slide way 35; alternatively, aplurality of scrollable round refractory balls 36, cylindricalrefractory rollers, heat-resistant bearings, or heat-resistant steelbars are arranged on the slide-way for the sliding bed 37 to slide on,in order to reduce the resistance to the sliding.

The slide way 35 is with horizontal placement or with inclined placementwhile the front segment of the slide way is positioned higher than theback segment thereof.

the first preparation chamber 3 for coaling is formed outside thepreheating segment 50, comprising of two first sealing walls, a firstsealing door 4, a front sealing door 7 of the furnace body, a firstceiling board and a first floor board; and a first displacement airsupplying channel is formed under the floor board and connected to thebottom flue 12 of the preheating segment, and the first displacementsupplying channel is provided with a first control valve 53 forcontrolling the supply of the displacement air; and a seconddisplacement air exhausting channel 5 is formed on the first ceilingboard and connected to the main flue, and the first displacement airexhausting channel is provided with a second control valve 54; and thefirst sealing door 4 of the first preparation chamber 3 is connectedwith a circulation slide way arranged outside; a second preparationchamber 23 for coke outlet outside the coke dry quenching segment 52 isformed by two second sealing walls, a second sealing door 24, a backsealing door 25 of the furnace body, a second ceiling board and a secondfloor board; a second displacement air supplying channel 13 connectedwith the bottom flue 12 of the preheating segment is formed under thefloor board of the second preparation chamber for coke outlet 23, and isprovided with a third control valve 55 for controlling the supply of thedisplacement air; and a second displacement air exhausting channel 26connected with the main flue 6 is formed on the second ceiling board ofthe second preparation chamber for coke outlet 23, and is provided witha fourth control valve 56; and the second sealing door 24 of the secondpreparation chamber for coke outlet 23 is connected with the circulationslide way formed outside.

A plurality of gas blocking dampers 9 which are also able to blockflame, containing Zirconium fibers, are provided in the space at thefurnace top 33 for partitioning the top space of the preheating segment50, carbonization segment 51 and the coke dry quenching segment 52.

The coke dry quenching segment 52 is located behind the carbonizationsegment 51, or is formed outside the second preparation chamber for cokeoutlet 23, further comprising a coke dry quenching chamber exclusivelyused by the sliding bed 37, and a gas inlet channel and a gas outletchannel are formed respectively at the bottom and top of the coke dryquenching chamber 52; and a coke quenching chamber with low moisture isfurther formed beside each coke dry quenching chamber as a standby. thedisplacement gas used in the first preparation chamber 3, coke outletpreparation chamber 23 and coke dry quenching chamber is oxygen freeflue gas after combustion exhausted from the bottom flue 12 ofpreheating segment or Nitrogen from a Nitrogen generating machine.

A branch coke gas collecting tube 8 is formed at the top 33 of thepreheating segment 50 and is connected with a gas collecting mains 28;and also the gas collecting mains 28 is connected with a gaspurification system for chemical product recovery.

The process of coke production using the furnace of claim 1 ischaracterized in comprising the steps of:

-   -   (1) according the requirement of products, preparing the raw        materials with a precise proportion using an electronic hopper,        mixing and stirring grinding the coal material 44, and shaping        the grinded coal material with pressure, and then stacking the        shaped coal onto the sliding bed, or moving the movable sliding        bed 37 to a tamping station, and then tamping the coal directly        on the movable sliding bed;    -   (2) transferring the sliding bed 37 loading the coal into the        first preparation chamber 3 through the circulation slide way        formed outside the furnace, and closing the first sealing door 4        and the second sealing door 24, and then switch on the first        control valve 53, the third control valve 55, the second control        valve 54, and the fourth control valve 56; and displacing the        air in the first preparation chamber 3 with the oxygen free gas        after combustion exhausted from the bottom flue 12 or with the        Nitrogen from a Nitrogen generating machine; and after        displacement, opening the front sealing door 7 and the back        sealing door 25 of furnace body; pushing the sliding bed 37 into        a tunnel kiln with a car pusher; pushing out a sliding bed        loading the coke after carbonization from the back door and into        a the second preparation chamber for coke outlet 23 by means of        a sliding bed in the furnace when another sliding bed loading        coal material 44 is pushed into the furnace from the front door;        and then closing the front sealing door 7 and the back sealing        door 25; after that transferring the coke extinguished from the        sliding bed 37 in the coking offloading area for offloading;    -   (3) with the intermittent movement of the sliding bed 37,        exchanging the heat of the coal material 44 with high        temperature exhausted flue gas in the bottom channel 46 of the        preheating segment and rapidly dehydrating the coal material 44,        and then collecting the coal gas with a gas collection tube 8        formed at the top of the preheating segment and introducing the        coal gas into a gas purification system for chemical product        recovery through a gas collection mains 28 for purification;        wherein, the purified coal gas can be directly used for the        power generation of an internal combustion engine for exhausted        coked gas, the external use, or is recovered in the coke furnace        for combustion; after major of coal gas is volatilized from the        coal material 44 in the preheating segment 50, transferring the        coal material 44 to the carbonization segment 51; then        introducing the remaining coal gas volatilized from the coal        material in the carbonization segment 51 to the bottom channel        38 of the carbonization segment, and allowing the coal gas to be        combusted with Oxygen further added, and keeping the temperature        of the coal material rising until the coal material is melted        and carbonized; finally, after the coal material 44 is bound and        contracted, cooling the coal material 44 contracted in the coke        dry quenching segment 52 to form coke product;    -   (4) transferring the heat in the coke dry quenching segment 52        to the carbonization segment 51 with the centrifugal fan 43        arranged at the end portion of the preheating chamber 22 of the        coke dry quenching segment 52 so as to allow the coal gas to        combust only with hot air during the process of carbonization;        and then introducing the exhausted hot gas after combustion into        the bottom flue 12 of the preheating segment 50, before the fact        that the exhausted hot gas passes through the bottom channel 46        of the preheating segment and the exhausted hot air channel 11        successively and rapidly dehydrate and preheat the coal material        44 loaded on the sliding bed 37; and meanwhile, cooling the coke        dry quenching segment 52; finally, allowing the coal gas to pass        through the branch flue 10, the main flue 6 and reach the heat        recovery steam boiler to generate steam for power generation of        steam turbine, and the electricity generated can be for self use        or sold on line; cooling the flue gas with the heat recovery        steam boiler, and then desulfurizing and purifying the cooled        flue gas, and finally exhausting the purified flue gas to the        external environment through the chimney.

In this invention, the resource is reasonably utilized, and a greatamount of low cost value coal material without adhesion or with lowadhesion with is selected for producing high quality coke with highstrength. The reasonable design of the structure of the furnace and theprocess for producing coke make possible to achieve the recovery of coalgas and chemical products, reasonable utilization of heat energy, highrate of coking, and high yield of production. It also may recover thecoal gas and chemical products, so as to realize power generationutilizing the remaining coal gas and heat. The furnace in this inventionis able to be applied to the coking and carbonization for briquette andcan be environmentally protective.

Obviously, the examples above are only for clearly describing the usesof new methods in practice, but not for making any restrictions to theways of implementing. Therefore, some reasonable modifications can bemade to the ways of implementing by the field-related ordinarytechnicians based on the methods described above. There is no need tothoroughly enumerate the ways of implementing, and it is also impossibleto achieve so. Therefore, some obvious modifications or changes based onthe methods described above will be still within the protective scope ofthe present invention.

1. A tunnel typed coking furnace, comprising: a furnace top, a firstinsulating layer formed at the furnace top, a ceiling beam, two sidewalls, a furnace body formed by a furnace body base and a furnace bottomconstituted by a second insulating layer formed at the bottom of thefurnace, a front sealing door of said furnace body, a back sealing doorof said furnace body, a branch flue, a bottom flue, and a main flue, ischaracterized in that said tunnel typed coking furnace consists of afirst preparation chamber for coaling, a preheating segment, acarbonization segment, a coke dry quenching segment, and a secondpreparation chamber for coke outlet, and each part has differentformation from the others, and are interconnected in series with theothers; and a plurality of individual bottom channels are formed abovesaid first insulating layer, and perpendicular to the direction of theseries connection of the parts of said furnace body; and a slide waythat the sliding bed for loading briquette or tamping coal materialmoves on is formed at the top of said bottom channels; and a heatexchange box is formed at the top of the furnace wall of coke dryquenching segment; and a preheating chamber formed between the internaland the external walls of said two side walls has a heat exchangechannel connecting said heat exchange box arranged at the top of saidcoke dry quenching segment to the bottom channel formed at the bottom ofsaid coke dry quenching segment, and said heat exchange box providedwith a first regulating damper and a first cold air tube is formed atthe top of said coke dry quenching segment; and said bottom channelprovided with a second regulating damper and a second cold air tubeconnected with centrifugal fan is formed at the bottom of said coke dryquenching segment; and said preheating chamber is provided with a hotair channel extending from the inside of the furnace to the inside ofinternal and external walls of said carbonization segment; and theoutlet of said hot air channel is provided with a regulating valveconnected with an oxygen inlet formed in the gas descending channellocated at the top of said carbonization segment and the oxygen tubeformed in the bottom channel of said carbonization segment respectivelythrough tubes; and a plurality of gas descending channels, each of whichis provided with a third regulating damper, are formed inside the twoside walls of said carbonization segment; and a flame guiding portconnected to the upper side of said carbonization segment, is formed onthe upper side of the internal wall of gas descending channels; anopenable flame observation port is corresponding to said flame guidingport is formed on the external wall of furnace; the lower side of saidgas descending channels is connected to the corresponding bottom channelof said carbonization segment which is also provided with a first airinlet connected with gas descending channels for supplying the air tothe bottom channel of said carbonization segment; and the upper side ofthe internal wall of said carbonization segment is provided with asecond air inlet staggered with said gas descending channels anddisconnected with the same; and the central areas of the bottoms of saidcarbonization segment and said preheating segment are connected witheach other through a bottom flue, and are also connected said bottomchannels thereof; said bottom channel of said preheating segment isprovided with a temperature regulating port connected to a exhausted hotair ascending channel formed inside the two side walls of saidpreheating segment, and is also provided with a second regulating damperfor regulating the air passage in said exhausted hot air ascendingchannel; and said exhausted hot air ascending channel is connected withsaid main flue through said branch flue; and said main flue is connectedwith a chimney outside; and no flame guiding port is provided on the twoside walls of said preheating segment and said coke dry quenchingsegment respectively.
 2. The coking furnace of claim 1, wherein saidsliding bed for loading briquette or tamping coal material is formed bythe heat-resistant metal plates or heat-resistant steel plates andnon-metallic alumina refractory board or cordierite-mullite boards; anda slide way is formed above the bottom channels and between the slidingbed and said bottom channels, said slide way is formed by high-densitysilicon bricks, high alumina bricks, aluminum phosphate bricks,phosphate bricks, corundum bricks, polycrystalline carbonized silicon orpolycrystalline silicon nitride.
 3. The coking furnace of claim 1,wherein said sliding bed directly slides on said slide way;alternatively, a plurality of scrollable round refractory balls,cylindrical refractory rollers, heat-resistant bearings, orheat-resistant steel bars are arranged on the slide way for said slidingbed to slide on, in order to reduce the resistance to the sliding. 4.The coking furnace of claim 1, wherein said slide way is with horizontalplacement or with inclined placement while the front segment of saidslide way is positioned higher than the back segment thereof.
 5. Thecoking furnace of claim 1, wherein said the first preparation chamberfor coaling is formed outside said preheating segment, comprising of twofirst sealing walls, a first sealing door, a front sealing door of saidfurnace body, a first ceiling board and a first floor board; and a firstdisplacement air supplying channel is formed under said floor board andconnected to said bottom flue of said preheating segment, and said firstdisplacement supplying channel is provided with a first control valvefor controlling the supply of the displacement air; and a seconddisplacement air exhausting channel is formed on the first ceiling boardand connected to said main flue, and said first displacement airexhausting channel is provided with a second control valve; and saidfirst sealing door of said first preparation chamber is connected with acirculation slide way arranged outside; a second preparation chamber forcoke outlet outside the coke dry quenching segment is formed by twosecond sealing walls, a second sealing door, a back sealing door of thefurnace body, a second ceiling board and a second floor board; a seconddisplacement air supplying channel connected with said bottom flue ofsaid preheating segment is formed under said floor board of said secondpreparation chamber for coke outlet, and is provided with a thirdcontrol valve for controlling the supply of the displacement air; and asecond displacement air exhausting channel connected with said main flueis formed on said second ceiling board of said second preparationchamber for coke outlet, and is provided with a fourth control valve;and said second sealing door of said second preparation chamber for cokeoutlet is connected with the circulation slide way formed outside. 6.The coking furnace of claim 1, wherein a plurality of gas blockingdampers which are also able to block flame, containing Zirconium fibers,are provided in the space at the furnace top for partitioning the topspace of said preheating segment, carbonization segment and said cokedry quenching segment.
 7. The coking furnace of claim 1 is characterizedin that said coke dry quenching segment is located behind saidcarbonization segment, or is formed outside said second preparationchamber for coke outlet, further comprising a coke dry quenching chamberexclusively used by the sliding bed, and a gas inlet channel and a gasoutlet channel are formed respectively at the bottom and top of saidcoke dry quenching chamber; and a coke quenching chamber with lowmoisture is further formed beside each coke dry quenching chamber as astandby.
 8. The coking furnace of claim 1, wherein the displacement gasused in said first preparation chamber, coke outlet preparation chamberand coke dry quenching chamber is oxygen free flue gas after combustionexhausted from said bottom flue of preheating segment or Nitrogen from aNitrogen generating machine.
 9. The coking furnace of claim 1, wherein abranch coke gas collecting tube is formed at the top of said preheatingsegment and is connected with a gas collecting mains; and also said gascollecting mains is connected with a gas purification system forchemical product recovery.
 10. The process of coke production using thefurnace of claim 1 comprising the steps of: (1) according therequirement of products, preparing the raw materials with a preciseproportion using an electronic hopper, mixing and stirring grinding thecoal material, and shaping the grinded coal material with pressure, andthen stacking said shaped coal onto said sliding bed, or moving saidmovable sliding bed to a tamping station, and then tamping the coaldirectly on said movable sliding bed; (2) transferring said sliding bedloading the coal into said first preparation chamber through saidcirculation slide way formed outside the furnace, and closing said firstsealing door and said second sealing door, and then switch on said firstcontrol valve, said third control valve, said second control valve, andsaid fourth control valve; and displacing the air in said firstpreparation chamber with the oxygen free gas after combustion exhaustedfrom the bottom flue or with the Nitrogen from a Nitrogen generatingmachine; and after displacement, opening said front sealing door andsaid back sealing door of furnace body; pushing said sliding bed into atunnel kiln with a car pusher; pushing out a sliding bed loading thecoke after carbonization from the back door and into a said secondpreparation chamber for coke outlet by means of a sliding bed in thefurnace when another sliding bed loading coal material is pushed intothe furnace from the front door; and then closing said front sealingdoor and said back sealing door; after that transferring the cokeextinguished from the sliding bed in the coking offloading area foroffloading; (3) with the intermittent movement of said sliding bed,exchanging the heat of said coal material with high temperatureexhausted flue gas in the bottom channel of said preheating segment andrapidly dehydrating said coal material, and then collecting said coalgas with a gas collection tube formed at the top of said preheatingsegment and introducing said coal gas into a gas purification system forchemical product recovery through a gas collection mains forpurification; wherein, the purified coal gas can be directly used forthe power generation of an internal combustion engine for exhaustedcoked gas, the external use, or is recovered in the coke furnace forcombustion; after major of coal gas is volatilized from said coalmaterial in said preheating segment, transferring said coal material tosaid carbonization segment; then introducing the remaining coal gasvolatilized from the coal material in said carbonization segment to thebottom channel of said carbonization segment, and allowing the coal gasto be combusted with Oxygen further added, and keeping the temperatureof the coal material rising until the coal material is melted andcarbonized; finally, after said coal material is bound and contracted,cooling said coal material contracted in said coke dry quenching segmentto form coke product; (4) transferring the heat in said coke dryquenching segment to said carbonization segment with said centrifugalfan arranged at the end portion of said preheating chamber of said cokedry quenching segment so as to allow the coal gas to combust only withhot air during the process of carbonization; and then introducing theexhausted hot gas after combustion into said bottom flue of saidpreheating segment, before the fact that the exhausted hot gas passesthrough the bottom channel of said preheating segment and said exhaustedhot air channel successively and rapidly dehydrate and preheat the coalmaterial loaded on said sliding bed; and meanwhile, cooling said cokedry quenching segment; finally, allowing the coal gas to pass throughsaid branch flue, said main flue and reach the heat recovery steamboiler to generate steam for power generation of steam turbine, and theelectricity generated can be for self use or sold on line; cooling theflue gas with said heat recovery steam boiler, and then desulfurizingand purifying the cooled flue gas, and finally exhausting the purifiedflue gas to the external environment through the chimney.